Inclusive γ-ray spectra from ψ(3095) and ψ′(3684) decays have been observed with segmented arrays of NaI(Tl) in an e+e- colliding-beam experiment. Three major peaks are seen in the ψ′ spectrum corresponding to ψ′→χγ with mχ=3561, 3511, and 3413 MeV/c2 and with branching fractions of (7.0±2.0), (7.1±1.9), and (7.2±2.3)%, respectively. Enhancements in the ψ′ spectrum at higher energies are consistent with decays χ→ψγ. The ψ spectrum shows no statistically significant structure.

Inclusive γ-Ray Spectra from ψ(3095) and ψ^{′}(3684) Decays

LIVAN, MICHELE;
1977

Abstract

Inclusive γ-ray spectra from ψ(3095) and ψ′(3684) decays have been observed with segmented arrays of NaI(Tl) in an e+e- colliding-beam experiment. Three major peaks are seen in the ψ′ spectrum corresponding to ψ′→χγ with mχ=3561, 3511, and 3413 MeV/c2 and with branching fractions of (7.0±2.0), (7.1±1.9), and (7.2±2.3)%, respectively. Enhancements in the ψ′ spectrum at higher energies are consistent with decays χ→ψγ. The ψ spectrum shows no statistically significant structure.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11571/497642
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